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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the L/GATE relay.
  2. Ignition OFF, test for less than 1.0 ohm of resistance between the relay coil ground circuit terminal and ground while pressing the Exterior Liftgate Switch.
    • If greater than the specified range, test for an open/high resistance. If the circuit tests normal, replace the BCM.
  3. Connect a test lamp between the Liftgate Release Relay Control terminal and the relay coil ground circuit terminal.
  4. Command the Liftgate Release ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the L/GATE relay.
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